Pen



FIG. 1 is a perspective view of a pen showing a first embodiment of my new design;

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a front elevational view of FIG. 1;

FIG. 4 is a side elevational view of FIG. 1, the opposite side being a mirror image;

FIG. 5 is a rear elevational view of FIG. 1;

FIG. 6 is a top plan view of FIG. 1;

FIG. 7 is a bottom plan view of FIG. 1;

FIG. 8 is a perspective view of a second embodiment of my new design;

FIG. 9 is an exploded perspective view of FIG. 8;

FIG. 10 is a front elevational view of FIG. 8;

FIG. 11 is a side elevational view of FIG. 8, the opposite side being a mirror image;

FIG. 12 is a rear elevational view of FIG. 8;

FIG. 13 is a top plan view of FIG. 8; and,

FIG. 14 is a bottom plan view of FIG. 8. 

The ornamental design for a pen, as shown and described. 